Key

Nose runs and Feet smell.. hence the confusion.

kangaroo

Time

chair

John made the statement “I will be boiled in water”. Because of this statement, wood fairies were confused.
If this statement was considered as true, then the fairies should have fried John in oil. But if they fry him in oil, then they make his statement false.
Hence, they freed John.

Too wise you are, too wise you be, I see you are too wise for me.

That man is watching the woman in a tv serial or movie.

It will take 5 days.
Based on the puzzle, 1 person can build 1 house in 5 day. Hence 100 persons when building simultaneously, can build 100 houses in 5 days.

Spider